Locomotive exhaust-steam nozzle



Dec. 23,- 1930.

A. LYMBURNER 1,785,907

LOCOMOTIVE EXHAUST STEAM NOZZLE Original Filed Nov. 50, 1927 i 2 I I v I I lnvem'i'of. A .LYMBLJQNEE,

Patented Dec. 23, 1930 UNITED STATES PATENT OFFICE} ARMANI) LYMBUR-NER, OF V'ERDUN, QUEBEC, CANADA, ASSIGNOR F ONE-HALF "10 JOSEPH J, DRISCOLL, OF CHICAGO, ILLINOIS LOCOMOTIVE EXHAUST-STEAM 1\TOZZ1'.|E:

'7 Application filed November 30, 1927, Serial No. 236,759. Renewed May 21, 1930.

The invention relates to a locomotive exhaust steam nozzle, as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially of the novel features of construction pointed out in the claim for novelty following a description containing an explanation in detail of an acceptable form of the invention.

The objects of the invention are to direct the exhaust steam to the walls of the stack and thereby create a vacuum and powerful suction whereby the waste products of com-c bustion are drawn tothe smoke outlet by an irresistible force that maintains a constant evacuation from the smoke box, and at the same time relieves the exhaust manifold of any and all accumulations or collections of spent steam liable to create, back pressure in the cylinders; to increase the power derived from the operation of the reciprocating member in the cylinders by the elimination of much of the back pressure incidental to the operation of a locomotive; to reduce the consumption of fuel and maintain a constantly efiicient fire in the locomotive furnace by means of the improved draft obtained by means of the powerful suction 3 aforesaid; and generally to provide in locomotives a reliable means of flushing both the smoke box and the exhaust manifold and thereby keeping-the outlets free for expelling the used gases and fluids.

In the drawings Figure 1 is a vertical sectional view; of the exhaust steam outlet pas sage showing the deflector member mounted therein.

Figure 2 is a sectional elevation of the 49 smoke box and stack outlet showing the steam discharge from the exhaust.

Figure 3 is a plan View showing the steam exhaust member with the deflector mounted therein and the stack outlet therearound.

7 from the manifold 11.

Like numerals of reference indicate cor-- The exhaust member 10 is flanged at the lower end and rigidly secured "to the cover 12 of said manifold 11, the latter being maintained in the smoke box ianem which the stack 14 extends, the stack extension 15 projecting downwardly from the stack 14 into the smoke box and flaring at its lower end 16 ascustomary.

The flare 16 is concentric with the upper end of the exhaust member 10, therefore the exhaust gases are "directed into the stack 14.

There have been a number of devices used for interrupting the exhaust steam in its discliargefrom the exhaust member 10, and notable among these devices are deflecting plates and automatically operating vanes, which open through the force of the steam, but such mechanical expedients do not as a rule have very much effect in relieving the back pressure in the cylinders, nor do they avoid the throbbing of the expended steam in finding its way to the stack outlet, and consequently the draft in the furnace is to a considerable extent intermittent, thus interfering materially with the steady incandescent condition of the fire.

It will thus be seen that there is a great diminution in efficiency for at every puff there is a brightened effect and between puffs the dulling of the incandenscence, in other words, while it is hardly perceptible to the eye, the fire in the furnace loses at momentary intervals its full force and effect, and this combined with the back pressure in the cylinders causes considerable loss in the matter of steam generation and a material increase in the consumption of fuel. 7

In this invention the deflector 17 is rigidly and centrally secured in the steam passage formedby the exhaust member 10, and is sub-.

stantially flush with the upper end thereof.

The deflector 17 is in the'form of an inverted frustrum of a cone-having the central rod orifice 18 through which the supporting rod 19 extends and is secured by the nut 20, this rod 19 having a shoulder 21 for supporting the deflector 17 and extending upwardly from the transverse bracket 22' secured in the walls of the exhaust passage.

The deflector 17 being centrally placed at the upper end of the exhaust member 10 forms an annular outlet 23, for the spent steam and the flow of steam discharging at great force is directed by downwardly tapered walls of the deflector in a flaring direction, while the perpendicular wall of the passage has a tendency to reduce the flare of the outgoing stream, therefore as the exhaust member 10 is situated below the flare of the stack extension 15 the steam strikes the wall immediately above the flare 16 in a steady forceful manner and travels upwardly along the walls of the extension and the stack to the out-let, and as the discharge is constant the smoke or waste products of combustion are drawn behind this stream into the stack and carried therewith in a steady flow to the stack and to the atmosphere.

hat I claim as my invention is In a locomotive exhaust steam nozzle, a smoke box, an exhaust manifold for the steam vertically extending into and supporting said smoke box and having an outlet at the upper end, a tubular steam exhaust nozzle projecting upwardly from said manifold and secured thereto around said outlet, a post rigidly secured to said manifold and extend ing centrally and vertically to the upper end of said nozzle and carrying on its reduced upper end a flaring block cooperating with the cylindrical wall of the nozzle in concentrating the steam discharge within gradually enlarging circles and a stack 01" approximately even diameter to said nozzle forming an outlet from said smoke box in vertical alignment with said nozzle.

Signed at Montreal, Canada, this 15th day of November, 1927.

ARMAND LYMBURNER. 

